Clause 2.3 Wall and Slab Thickness of HS and NS

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Clause 2.3 Wall and Slab Thickness of HS and NS

TRHS 2023

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2.3.1 Wall Thickness of HS and NS

a. The minimum HS and NS wall thickness shall be in accordance with TABLE 2.3.1(a) for landed development and TABLE 2.3.1(b) for non-landed development.

b. Wall thickness of any HS or NS within the HS tower shall not be less than the wall thickness of the HS or NS above it.

c. The minimum thickness of the internal common wall between two adjacent HS for non-landed and landed cluster housing developments shall be 200mm thick. See FIGURE 2.3.1(c).

d. For landed developments where the two HS are abutting each other, the common wall shall be cast as two separate adjoining walls. See FIGURE2.3.1(d).

e. The minimum thickness of the basement HS wall facing a reinforced concrete basement storey wall without any opening within the influence zone shall be 200mm. See FIGURE 2.4.6(a) and (b).

f. The minimum thickness of the basement HS wall which is in direct contact with earth throughout its entire height shall be in accordance with FIGURE 2.4.6(c).

g. The minimum thickness of the basement HS wall facing a reinforced concrete basement storey wall with opening within the influence zone shall be in accordance with TABLE 2.3.1(a).

2.3.2 Slab Thickness of HS and Enclosed NS

a. Ceiling slab of top-most HS in non-landed development - 300mm. See FIGURE 2.3.2.

b. Slab between 2 HS - 175mm. See FIGURE 2.3.2.

c. Floor slab of bottom-most HS without NS below – 200mm. See FIGURE 2.3.2.

d. Floor slab of bottom-most NS in contact with soil – 200mm.

e. Slab between 2 enclosed NS – 175mm. See FIGURE 2.3.2.

f. Slab between HS and enclosed NS – 175mm. See FIGURE 2.3.2.

g. Ceiling slab of top-most HS in landed development – 300mm or 250mm (if there is a RC roof or another RC slab above the HS that is equal or extend beyond the required setback distance of that HS wall). See FIGURE 2.3.2(f).

2.3.3 Slab Thickness of HS and Non-Enclosed NS

a. Floor slab of HS that is directly supported by non-enclosed NS, NS walls or columns – 300mm. See FIGURE 2.3.2.

b. Ceiling slab of HS which is below non-enclosed NS, NS walls or columns – 300mm. See FIGURE 2.3.2.

c. Slab between 2 non-enclosed NS – 175 mm. See FIGURE 2.3.2.

TABLE 2.3.1(a) MINIMUM HS AND NS WALL THICKNESS (FOR LANDED DEVELOPMENTS)
Storey Height (SH) (mm)	HS Clear Height (mm)	Setback Distance of HS Wall(mm)	Wall Thickness (mm)
HT ≤ 4000	2400 ≤ Ht ≤ 3900	≤ 6000mm	250
		> 6000mm	200
4000 < Ht ≤ 6000	2400 ≤ Ht ≤ 3900	≤ 7000mm	250
		> 7000mm	200
6000 < Ht ≤ 8000	2400 ≤ Ht ≤ 3900	≤ 8000mm	250
		> 8000mm	200
8000 < Ht ≤ 10000	2400 ≤ Ht ≤ 3900	≤ 9000mm	250
		> 9000mm	200

TABLE 2.3.1(b) MINIMUM HS AND NS WALL THICKNESS (FOR NON-LANDED DEVELOPMENTS)
Storey Height (SH) (mm)	HS Clear Height (mm)	Setback Distance of HS Wall(mm)	Wall Thickness (mm)
Ht ≤ 4000	2400 ≤ Ht ≤ 3400	≤ 6000	250
	2400 ≤ Ht ≤ 3400	> 6000	200
	3000 < Ht ≤ 3200	≤ 6000	275
	3000 < Ht ≤ 3200	> 6000	225
	3200 < Ht ≤ 3900	≤ 6000	300
	3200 < Ht ≤ 3900	> 6000	250
4000 < Ht ≤ 6000	2400 ≤ Ht ≤ 3000	≤ 7000	250
	2400 ≤ Ht ≤ 3000	> 7000	200
	3000 < Ht ≤ 3200	≤ 7000	275
	3000 < Ht ≤ 3200	> 7000	225
	3200 < Ht ≤ 3900	≤ 7000	300
	3200 < Ht ≤ 3900	> 7000	250
6000 < Ht ≤ 8000	2400 ≤ Ht ≤ 3000	≤ 8000	250
	2400 ≤ Ht ≤ 3000	> 8000	200
	3000 < Ht ≤ 3200	≤ 8000	275
	3000 < Ht ≤ 3200	> 8000	225
	3200 < Ht ≤ 3900	≤ 8000	300
	3200 < Ht ≤ 3900	> 8000	250
8000 < Ht ≤ 10000	2400 ≤ Ht ≤ 3000	≤ 9000	250
	2400 ≤ Ht ≤ 3000	> 9000	200
	3000 < Ht ≤ 3200	≤ 9000	275
	3000 < Ht ≤ 3200	> 9000	225
	3200 < Ht ≤ 3900	≤ 9000	300
	3200 < Ht ≤ 3900	> 9000	250

TABLE 2.3.1(a) MINIMUM HS AND NS WALL THICKNESS (FOR LANDEDDEVELOPMENTS)
Storey Height (SH) (mm)	HS Clear Height (mm)	Setback Distance of HS Wall(mm)	Wall Thickness (mm)
HT ≤ 4000	2400 ≤ Ht ≤ 3900	≤ 6000mm	250
		> 6000mm	200
4000 < Ht ≤ 6000	2400 ≤ Ht ≤ 3900	≤ 7000mm	250
		> 7000mm	200
6000 < Ht ≤ 8000	2400 ≤ Ht ≤ 3900	≤ 8000mm	250
		> 8000mm	200
8000 < Ht ≤ 10000	2400 ≤ Ht ≤ 3900	≤ 9000mm	250
		> 9000mm	200

TABLE 2.3.1(b) MINIMUM HS AND NS WALL THICKNESS (FOR NON-LANDED DEVELOPMENTS)
Storey Height (SH) (mm)	HS Clear Height (mm)	Setback Distance of HS Wall(mm)	Wall Thickness (mm)
Ht ≤ 4000	2400 ≤ Ht ≤ 3400	≤ 6000	250
	2400 ≤ Ht ≤ 3400	> 6000	200
	3000 < Ht ≤ 3200	≤ 6000	275
	3000 < Ht ≤ 3200	> 6000	225
	3200 < Ht ≤ 3900	≤ 6000	300
	3200 < Ht ≤ 3900	> 6000	250
4000 < Ht ≤ 6000	2400 ≤ Ht ≤ 3000	≤ 7000	250
	2400 ≤ Ht ≤ 3000	> 7000	200
	3000 < Ht ≤ 3200	≤ 7000	275
	3000 < Ht ≤ 3200	> 7000	225
	3200 < Ht ≤ 3900	≤ 7000	300
	3200 < Ht ≤ 3900	> 7000	250
6000 < Ht ≤ 8000	2400 ≤ Ht ≤ 3000	≤ 8000	250
	2400 ≤ Ht ≤ 3000	> 8000	200
	3000 < Ht ≤ 3200	≤ 8000	275
	3000 < Ht ≤ 3200	> 8000	225
	3200 < Ht ≤ 3900	≤ 8000	300
	3200 < Ht ≤ 3900	> 8000	250
8000 < Ht ≤ 10000	2400 ≤ Ht ≤ 3000	≤ 9000	250
	2400 ≤ Ht ≤ 3000	> 9000	200
	3000 < Ht ≤ 3200	≤ 9000	275
	3000 < Ht ≤ 3200	> 9000	225
	3200 < Ht ≤ 3900	≤ 9000	300
	3200 < Ht ≤ 3900	> 9000	250

TABLE 2.3.1(a) MINIMUM HS AND NS WALL THICKNESS (FOR LANDED DEVELOPMENTS)

TABLE 2.3.1(b) MINIMUM HS AND NS WALL THICKNESS (FOR NON-LANDED DEVELOPMENTS)

FIGURE 2.3.1(c) INTERNAL COMMON WALL BETWEEN TWO HS IN NON- LANDED AND LANDED CLUSTER HOUSING DEVELOPMENTS

FIGURE 2.3.1(d) SEPARATE WALLS BETWEEN TWO HS IN INTERMEDIATE LANDED DEVELOPMENTS

FIGURE 2.4.6(a) PLAN OF A BASEMENT HS

FIGURE 2.4.6(b) PLAN OF A BASEMENT HS (WITH HS DOOR FACES RC BASEMENT WALL)

FIGURE 2.4.6(c) SECTIONAL VIEW OF A BASEMENT HS

TABLE 2.3.1(a) MINIMUM HS AND NS WALL THICKNESS (FOR LANDED DEVELOPMENTS)

TABLE 2.3.1(b) MINIMUM HS AND NS WALL THICKNESS (FOR NON-LANDED DEVELOPMENTS)

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2(f) MINIMUM DIMENSIONS OF CEILING SLAB FOR HS IN LANDED DEVELOPMENT

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

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TABLE 2.3.1(a) MINIMUM HS AND NS WALL THICKNESS (FOR LANDED DEVELOPMENTS)

TABLE 2.3.1(b) MINIMUM HS AND NS WALL THICKNESS (FOR NON-LANDED DEVELOPMENTS)

FIGURE 2.3.1(c) INTERNAL COMMON WALL BETWEEN TWO HS IN NON- LANDED AND LANDED CLUSTER HOUSING DEVELOPMENTS

FIGURE 2.3.1(d) SEPARATE WALLS BETWEEN TWO HS IN INTERMEDIATE LANDED DEVELOPMENTS

FIGURE 2.4.6(a) PLAN OF A BASEMENT HS

FIGURE 2.4.6(b) PLAN OF A BASEMENT HS (WITH HS DOOR FACES RC BASEMENT WALL)

FIGURE 2.4.6(c) SECTIONAL VIEW OF A BASEMENT HS

TABLE 2.3.1(a) MINIMUM HS AND NS WALL THICKNESS (FOR LANDED DEVELOPMENTS)

TABLE 2.3.1(b) MINIMUM HS AND NS WALL THICKNESS (FOR NON-LANDED DEVELOPMENTS)

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2(f) MINIMUM DIMENSIONS OF CEILING SLAB FOR HS IN LANDED DEVELOPMENT

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS

FIGURE 2.3.2 HS TOWER SHOWING HS AND NS (WITH ENCLOSED AND NON-ENCLOSED NS WALL) SLAB THICKNESS